CN109612412B - Method for calculating roughness of joint surface of precast concrete member and evaluation system - Google Patents
Method for calculating roughness of joint surface of precast concrete member and evaluation system Download PDFInfo
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- CN109612412B CN109612412B CN201811437184.2A CN201811437184A CN109612412B CN 109612412 B CN109612412 B CN 109612412B CN 201811437184 A CN201811437184 A CN 201811437184A CN 109612412 B CN109612412 B CN 109612412B
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
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Abstract
The invention relates to a method for calculating the roughness of a joint surface of a precast concrete member, which comprises the following steps: step 1: acquiring original three-dimensional laser point cloud data; step 2: carrying out coordinate transformation on the original three-dimensional laser point cloud data; and step 3: smoothing the original three-dimensional laser point cloud data after coordinate conversion; and 4, step 4: calculating the volume V of the concrete removed during the construction of the joint surface; and 5: calculating the area S of the joint surface of the precast concrete sample, which accounts for the surface of the precast concrete sample; step 6: and obtaining the calculated value a of the roughness of the joint surface as V/S. Compared with the prior art, the method for evaluating the roughness of the joint surface of the precast concrete component based on the three-dimensional laser scanning technology is reliable, effective, feasible, accurate and comprehensive, and is used for the joint surface of the precast concrete component of the fabricated building, and can be applied to the evaluation of the construction quality of the rough surfaces of the components such as precast walls, columns, beams, plates and the like.
Description
Technical Field
The invention relates to the field of evaluation and monitoring of precast concrete members, in particular to a method and a system for calculating the roughness of a joint surface of a precast concrete member.
Background
Compared with the traditional building, the prefabricated building has the advantages of energy conservation, emission reduction, environmental protection, industrial production, rapid construction, short construction period and the like, can improve the defects of low labor productivity, low technical innovation and low building quality of the building industry at the current stage of China, promotes the change of the construction mode, can improve the informatization and visual management and control management level of enterprises, and promotes the generation of related new production and service industry through the integration of a prefabricated industrial chain, so that the core competitiveness of each enterprise on the industrial chain can be improved, and the whole industry is standardized and normalized, so that the information flow, the logistics and the fund flow are effectively integrated. At present, the joint surface of the prefabricated building component mostly adopts a rough surface form, but the following defects exist in the production process of a test piece:
1. the rough surface manufacturing technology comprises exposed aggregate, napping, chiseling and printing, the quality of the joint surfaces adopting different construction processes is uneven, and the construction quality is difficult to guarantee.
2. The rough surface is evaluated mainly by the concave-convex depth at present, and the comprehensive effective and feasible evaluation standard of the rough surface of the component is lacked.
3. The traceability and the whole process evaluation of the rough surface of the product cannot be realized.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a method and an evaluation system for calculating the roughness of the joint surface of a precast concrete member based on a three-dimensional laser scanning technology, which are reliable, effective, feasible, accurate and comprehensive and are used for the joint surface of the precast concrete member of an assembly building, and are particularly applied to the evaluation of the construction quality of the rough surfaces of the precast concrete members such as precast walls, columns, beams, plates and the like.
The purpose of the invention can be realized by the following technical scheme:
a method for calculating the roughness of a joint surface of a precast concrete member comprises the following steps:
step 1: scanning the surface of the joint surface of the precast concrete sample by using a three-dimensional laser scanner to obtain original three-dimensional laser point cloud data;
step 2: performing coordinate transformation on the original three-dimensional laser point cloud data by taking the plane where the prefabricated concrete test piece joint surface is positioned as an x-y plane and taking the plane vertical to the x-y plane as a z-axis;
and step 3: smoothing the original three-dimensional laser point cloud data after coordinate conversion to obtain smoothed three-dimensional laser point cloud data;
and 4, step 4: calculating the integral of a point cloud smoothing surface to a plane passing through the maximum point of the z coordinate and parallel to the x-y surface according to the smoothed three-dimensional laser point cloud data to obtain the volume V of the removed concrete during the construction of the joint surface;
and 5: calculating the projection area of the smoothed three-dimensional laser point cloud data on an x-y plane according to the smoothed three-dimensional laser point cloud data to obtain the area S of the prefabricated concrete test piece joint surface occupied by the prefabricated concrete test piece surface;
step 6: and obtaining a calculated value a of the roughness of the joint surface as V/S according to the volume V of the concrete removed during the construction of the joint surface and the area S of the joint surface.
Further comprising: and establishing a BIM actual measurement model of the joint surface of the precast concrete member by a three-dimensional laser scanning technology.
A system for evaluating the roughness of the joint surface of a precast concrete member according to the calculation method comprises the following steps:
the acquisition module is used for reading the original three-dimensional laser point cloud data acquired in the step 1 and executing the step 2 and the step 3;
the calculation module is used for executing the steps 4 to 6 according to the point cloud data acquired by the acquisition module;
and the comparison module is used for extracting a roughness design value from the design BIM model, comparing the roughness design value with the calculation result of the calculation module, finishing roughness evaluation and outputting an evaluation result.
The acquisition module comprises:
the data reading unit is used for reading original three-dimensional laser point cloud data acquired by the three-dimensional laser scanner and identifying effective data representing the joint surface part of the precast concrete member;
and the coordinate conversion unit is used for identifying the plane where the joint surface of the precast concrete member is located in the data identified by the data reading unit, establishing a spatial three-dimensional rectangular coordinate system by taking the plane as an x-y plane, and completing the coordinate conversion of the data.
The computing module comprises:
the data fitting unit is used for smoothing the point cloud data;
and the roughness calculating unit is used for calculating the volume V and the joint surface area S of the removed concrete during the construction of the joint surface, and calculating the calculated value a of the roughness of the joint surface, which is V/S.
The comparison module comprises:
a design value reading unit for obtaining a design value a of the roughness of the joint surface in the BIM model0；
A comparison unit for comparing the roughness obtained by the calculation moduleThe calculated value a and the design value a of the roughness of the joint surface obtained by the design value reading unit0Obtaining the roughness evaluation result of the joint surface according to the relative relation;
and the output unit is used for outputting the evaluation result of the roughness of the joint surface.
Compared with the prior art, the method for evaluating the roughness of the joint surface of the precast concrete component based on the three-dimensional laser scanning technology is reliable, effective, feasible, accurate and comprehensive, is used for the joint surface of the precast concrete component of the fabricated building, and can be applied to the evaluation of the construction quality of the rough surface of the precast concrete component such as a precast wall, a column, a beam, a plate and the like.
Drawings
Fig. 1 is a flowchart of the calculation method according to the embodiment.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
As shown in fig. 1, a method for calculating the roughness of the joint surface of a precast concrete member includes the following steps:
s1: preparing a plurality of precast concrete samples, and carrying out joint surface construction operation on the designed positions of the surfaces of the precast concrete samples according to different construction methods;
s2: scanning the surface of the precast concrete sample with different joint surfaces by using a three-dimensional laser scanner to obtain original three-dimensional laser point cloud data of the surface of the precast concrete sample;
s3: performing coordinate transformation on the original three-dimensional laser point cloud data, wherein the plane where the surface of the precast concrete sample is located is an x-y plane, and the plane perpendicular to the x-y plane is a z-axis;
s4: smoothing the original three-dimensional laser point cloud data after coordinate conversion to obtain smoothed three-dimensional laser point cloud data;
s5: calculating the integral of the point cloud smooth surface relative to the plane passing through the maximum point of the plane z coordinate and parallel to the x-y surface according to the smoothed three-dimensional laser point cloud data to obtain the volume V of the removed concrete during the construction of the joint surface;
s6: calculating the projection area of the three-dimensional laser point cloud data on an x-y plane according to the smoothed three-dimensional laser point cloud data to obtain the area of a joint surface, namely the area S of the joint surface of the precast concrete sample, which accounts for the surface of the precast concrete sample;
s7: and obtaining a calculated value a of the roughness of the joint surface as V/S according to the volume V of the concrete removed during the construction of the joint surface and the area S of the joint surface.
Claims (6)
1. A method for calculating the roughness of a joint surface of a precast concrete member is characterized by comprising the following steps:
step 1: scanning the surface of the joint surface of the precast concrete sample by using a three-dimensional laser scanner to obtain original three-dimensional laser point cloud data;
step 2: performing coordinate transformation on the original three-dimensional laser point cloud data by taking the plane where the prefabricated concrete test piece joint surface is positioned as an x-y plane and taking the plane vertical to the x-y plane as a z-axis;
and step 3: smoothing the original three-dimensional laser point cloud data after coordinate conversion to obtain smoothed three-dimensional laser point cloud data;
and 4, step 4: calculating the integral of a point cloud smoothing surface to a plane passing through the maximum point of the z coordinate and parallel to the x-y surface according to the smoothed three-dimensional laser point cloud data to obtain the volume V of the removed concrete during the construction of the joint surface;
and 5: calculating the projection area of the smoothed three-dimensional laser point cloud data on an x-y plane according to the smoothed three-dimensional laser point cloud data to obtain the area S of the prefabricated concrete test piece joint surface occupied by the prefabricated concrete test piece surface;
step 6: and obtaining a calculated value a of the roughness of the joint surface as V/S according to the volume V of the concrete removed during the construction of the joint surface and the area S of the joint surface.
2. The method for calculating the roughness of the joint surface of the precast concrete unit according to claim 1, further comprising: and establishing a BIM actual measurement model of the joint surface of the precast concrete member by a three-dimensional laser scanning technology.
3. A system for evaluating the roughness of the joint surface of a precast concrete member according to the calculation method of claim 1 or 2, comprising:
the acquisition module is used for reading the original three-dimensional laser point cloud data acquired in the step 1 and executing the step 2 and the step 3;
the calculation module is used for executing the steps 4 to 6 according to the point cloud data acquired by the acquisition module;
and the comparison module is used for extracting a roughness design value from the design BIM model, comparing the roughness design value with the calculation result of the calculation module, finishing roughness evaluation and outputting an evaluation result.
4. The system of claim 3, wherein the acquisition module comprises:
the data reading unit is used for reading original three-dimensional laser point cloud data acquired by the three-dimensional laser scanner and identifying effective data representing the joint surface part of the precast concrete member;
and the coordinate conversion unit is used for identifying the plane where the joint surface of the precast concrete member is located in the data identified by the data reading unit, establishing a spatial three-dimensional rectangular coordinate system by taking the plane as an x-y plane, and completing the coordinate conversion of the data.
5. The system of claim 3, wherein the computing module comprises:
the data fitting unit is used for smoothing the point cloud data;
and the roughness calculating unit is used for calculating the volume V and the joint surface area S of the removed concrete during the construction of the joint surface, and calculating the calculated value a of the roughness of the joint surface, which is V/S.
6. The system of claim 3, wherein the alignment module comprises:
a design value reading unit for obtaining a design value a of the roughness of the joint surface in the BIM model0；
A comparison unit for comparing the roughness calculated value a obtained by the calculation module with the design value a of the roughness of the joint surface obtained by the design value reading unit0Obtaining the roughness evaluation result of the joint surface according to the relative relation;
and the output unit is used for outputting the evaluation result of the roughness of the joint surface.
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| CN111561884B (en) * | 2020-04-28 | 2021-01-19 | 昆山市建设工程质量检测中心 | Method for detecting surface roughness of precast concrete laminated plate |
| CN111561885B (en) * | 2020-05-14 | 2020-11-17 | 昆山市建设工程质量检测中心 | Prefabricated part strip-shaped groove joint surface roughness evaluation method based on white light scanning |
| CN112414326B (en) * | 2020-11-10 | 2022-05-20 | 浙江华睿科技股份有限公司 | Method and device for detecting surface flatness of object, electronic device and storage medium |
| CN112414327B (en) * | 2020-11-17 | 2022-08-09 | 中国三峡建设管理有限公司 | Handheld concrete roughness three-dimensional detection device and method |
| CN113340241B (en) * | 2021-06-09 | 2022-12-02 | 河南德朗智能科技有限公司 | Binocular vision concrete joint surface roughness measurement method and system |
| CN113758459A (en) * | 2021-09-07 | 2021-12-07 | 郑州大学 | Method for quantitatively characterizing morphological characteristics of contact surface of high polymer grouting material and concrete |
| CN115290010A (en) * | 2022-04-13 | 2022-11-04 | 同济大学 | Concrete joint surface roughness detection method and equipment |
| CN114608492A (en) * | 2022-04-14 | 2022-06-10 | 上海市建筑科学研究院有限公司 | Evaluation method for roughness evaluation index of joint surface of precast concrete member |
| CN117553713B (en) * | 2024-01-09 | 2024-03-29 | 南京信瑞智慧建筑科技有限公司 | Method and device for detecting rough quality of joint surface of precast concrete member |
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